Best time to visit Nepal and trekking:
Springs (early April to May) and autumn (early October to late November) are no doubt best time to visit Nepal.
Money matter: All the major cities have ATM services, easier to change money at Hotels and market, you read the news paper to know the current exchange rates.
Restaurant in Kathmandu: Rum Doodle, Third Eye restaurant, Bhojan Griha for Nepalese food and cultural presentation.
Visa: you can get on arrival in Kathmandu airport, for 15 days US$ 25, US$ 40 for 30 days multiple visa, please bring one each passport size photo.
Transport: Metered taxis are widely available. Local buses and mini/micro buses are available to reach almost all the points in Kathmandu City. But the buses do not run according to schedule time. You can also hire bicycle and motorbike.
Shopping in Kathmandu: The morning time gets you the best prices, especially if your the first customer. Key is to bargain... bargain.
Base Camp Acclimation: Give yourself at least 2 rest days on the way to base camp if flying into Lukla...climb high - sleep low.
Bring face mask: The trails can be very dusty and these can be helpful also good in Kathmandu when pollution is high.
Water: Don't trust normal water in Kathmandu and in the hotels.
This tip is provided by supplier M14709